Which AWS service or feature should the company use to meet these requirements?

Explanations:

Cost allocation tags allow users to assign metadata to AWS resources. By enabling these tags, the company can categorize and track AWS usage costs according to their business categories, making it easier to analyze and report on expenses.

AWS Organizations is primarily used for managing multiple AWS accounts in a centralized manner. While it can help in consolidating billing, it does not provide the detailed categorization of costs by business units.

AWS Security Hub is a security service that provides a comprehensive view of security alerts and security posture across AWS accounts. It does not track or categorize AWS usage costs.

AWS Cost and Usage Report provides detailed information about AWS costs and usage but does not categorize costs by business categories unless cost allocation tags are used. Therefore, it cannot meet the requirement alone.